| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a copper foil for a lithium ion battery collector, excellent in ultrasonic weldability. <P>SOLUTION: In a copper foil for a lithium ion battery collector, a dynamic friction coefficient between one surface and the other surface thereof is 0.5 or less, and a thickness of a surface coating formed on a surface of the copper foil and comprising an oxide film and/or a rust-proof coating is 0.5 to 5 nm. The copper foil has an average (Ra) of surface roughness values of a surface and a rear face of 0.20 μm or less in a rolling foil, and an average (Rz) of surface roughness values of a drum face and an electrodeposition face of 1.2 μm or less in an electrolytic foil. <P>COPYRIGHT: (C)2012,JPO&INPIT |
